elliott



UNITED sTATEs PATENT oEEioE.

GEO. ELLIOTT AND G. F. ELLIOTT, OF MANCHESTER, CONNECTICUT.

LOCK.

Specification of Letters Patent No. 27,262, dated February 21, 1860.

To all whom it may concern:

Be it known that we, GEORGE ELLIOTT and GEORGE F. ELLIOTT, both of Manchester, in the county of Hartford and State of Connecticut, have invented a new and Improved Mode of Constructing a Lock; and we do hereby declare that the following is a full clear, and exact description of the same, reference being had to the accompanying drawing, forming a part of this specification, in which- Figure l, is a front view of the exterior' of the lock detached from the door or other object. It is shown upside down. Fig. 2, is a vertical transverse section of the same in the line w, E'. Fig. 3, is a vertical transverse section in the line fy, y. Fig. 4, is a perspective view of the inner or back plate of the lock. Fig. 5, is a front view of the first locking plate. Fig. 6, is a front view of the second locking plate. Fig. 7, is an interior view of the front or cap piece, with movable tumbler attached. Fig. 8, is a view of the key.

Similar letters of reference, in each of the several figures indicate corresponding part-s.

The nature of our invention consists in the combination of the several parts of the lock substantially as hereinafter described.

To enable others, skilled in the art, to make and use our invention, we will proceed to describe its construction and operation.

`We construct our lock by making a circular back plate or disk A, with screw-holes a, a, a, a, a, around the margin for the purpose of securing it to the object to be fastene-d or locked; a segment is cut off one side Z), b, to fit up even with the edge of thev desk, chest or whatever it may be applied to, and to present a square edge to the lid and base of hasp, hook or catch f. IVithin the circle of the holes is a rim or ring (Z, raised from the plate for the purpose of fastening to it the remainder of the case D, of the lock; on one side of this rim is a square orifice c, for the admission of the catch In the center of the plate is the pivot g, upon which the hook plates B, B', and the key, Fig'. S, reciprocate; on one side of it and within the ring d, are two spring pins or bolts 71., 7L', inclosed in cases or sockets z', z'. The pins h, t, pass through holes j, c, k, in hook plates B, B', and secure them in position when locked.

The circular plate B, is a hairs-breadth smaller than the diameter of the rim d, and is the first to be placed on the pivot g, and when thus arranged, the long spring' pin h1, protrudes through the slot j, while the short pin z, enters the hole icl. Near the margin of this plate, a space Z, is out to receive the catch j", a hook my, is also formed on it at this point to clasp the catch f, when a certain movement in the plate takes place. The circular plate B, which is of the same diameter as plate B, is constructed with a space n, near its margin, to admit the catch, f, two hooks 0, to receive the catch and also a hole 'z, to receive the pin 71.1 of the slot j. Constructed on plate B, inside of the hooks, but outside of the pins, is a circular rim F, so placed as to be eccentric to the axis of the plate to about the extent of its own thickness, so that while the end Q, of the key g1, will pass freely within one portion of the rim, it will not be allowed to do so at another portion. In order to provide room for the end of the key between the points as, a section of this rim is cut out circumferentially, commencing at x1, and terminat ing at in a slot r, large enough to admit they point or nib q2, of the key. The portion removed is replaced by another similar shaped piece E, which we term a movable tumbler or ward. This ward is held in place by a circular spring El, which attaches to the cap D. The movable ward might be dispensed with, but as it answers to prevent inspection of the parts, we think it advisable to use it.

The mode of operation is thus: First insert the key in the key-hole, turn the nib of the key slightly in the direction of the arrow, then pull it toward you so that it presses against the front of the lock in which position the nib will be brought in Contact with the movable ward, continue to rotate the key in the same direction, keeping it against the front until it is directly opposite the point of entrance when it will be in the top of slot and over the hole le, now press the key in from you and you will force the spring pin TL, back out of the hook plates B, B, which you may now rotate in the opposite direction the length of the slot j, by turning the key till you feel it hook the catch plate B. Both plates will now be hooked one way, z'. e. from left to right; now draw the key toward you out of the back plate, being careful to keep it in the front plate and .turn the key back till it hooks from right to left; it is noW locked, keep the key against the front of the lock and turn back until y0u can Withdraw it. To unlock it, insert the key, turn the nib from left to right or in the direction of the arrow to the point opposite the entrance, then press it from you to force the pin 72,', out of the hook plates and turn in the opposite direction, till you feel it strike the other end of the slot J then draW the key out of the back hook plate, being careful to keep it inserte'd in the front hook plate, then turn backward about half Way to the point of entrance, When the foot of the key Will be over the spring pin, h, which you force through the back hook plate and keep pressed from you While you turn back to the point opposite the entrance or key hole: it is now unlocked.

What We claim as our invention and desire to secure by Letters Patent, is-

1. The combination of the hook plates B, B, spring pins l1., h, and inclined slotted 25 GEORGE ELLIOTT. GEORGE F. ELLIOTT.

Vitnesses DAVID S. CALHOUN, O. W. JACQUES. 

